CN106208268A - Based on the constant current constant voltage vicarious wireless charging system becoming einer Primargrosse - Google Patents

Abstract

The invention discloses a kind of based on the constant current constant voltage vicarious wireless charging system becoming einer Primargrosse, it is made up of transmitting portion and receiving portion, constant current constant voltage switching circuit one realization that transmitting portion is provided with, the composition of switching circuit one is: seal in primary constant current electric capacity (C between high-frequency inverter (H) and primary coil successively_PC) and primary additional serial electric capacity (C_PS), and at primary additional serial electric capacity (C_PS) upper parallel connection switching switch one；And the control end of switching switch one is connected with controller one, as shown in Figure 1；Or transmitting portion is provided with constant current constant voltage switching circuit two, the composition of switching circuit two is: the primary constant voltage electric capacity (C of concatenation between described high-frequency inverter (H) and primary coil_PV)；Primary additional shunt capacitance (C_PP) and switching switch two series connection after be then parallelly connected with primary constant voltage electric capacity (C_PVOn), and the control end of switching switch two is connected with controller two.This system can export and the unrelated constant current of load and constant voltage, and structure and control is simple, working stability, low cost of manufacture.

Description

Based on the constant current constant voltage vicarious wireless charging system becoming einer Primargrosse

Technical field

The present invention relates to a kind of based on the constant current constant voltage vicarious wireless charging system becoming einer Primargrosse.

Background technology

Vicarious wireless power transmission technology by magnetic field in a non-contact manner to electrical appliance carry out flexible, safe, can By power supply, it is to avoid safety problems such as contact sparking that traditional plug-in type electric energy transmission system exists, electric leakages.This technology is the widest General apply to the fields such as built-in medical treatment device, consumption electronic product, illumination and electric automobile.Wherein, use vicarious wireless The development prospect that electric energy transmission system carries out wireless charging to battery is huge.

In order to realize cell safety charging, extend service life and the discharge and recharge number of times of battery, mainly include constant current With two charging stages of constant voltage.I.e. using constant current mode at the charging initial stage, cell voltage increases sharply；When cell voltage reaches to fill During electricity setting voltage, using constant voltage mode charging, charging current is progressively smaller until and reaches charge cutoff electric current, charging complete. Namely the vicarious wireless charging system being charged battery should be able to provide constant electric current and voltage.

The main composition of existing wireless charging system and work process be: industrial-frequency alternating current becomes direct current through rectification, After inverter, DC inverter becomes high-frequency alternating current, and high frequency alternating current injects primary coil, produces high-frequency alternating magnetic field； Secondary coil induces induction electromotive force in the high frequency magnetic field that primary coil produces, and this induction electromotive force is by after high-frequency rectification Electric energy is provided to load.Owing to the equiva lent impedance of load (battery) is variation, so system is difficult under certain input voltage Constant current needed for output loading or voltage.For solving this problem, usual way has two kinds: one, draw in Circuits System Enter close loop negative feedback control, as added controller regulation input voltage before inverter or using phase shifting control, or secondary DC-DC converter is added after level coil rectification；Its defect is, adds control cost and complexity, reduces system stability. Two, using VFC, system is operated in two different frequency points and realizes constant current and constant voltage output, but the method there will be frequency Rate bifurcation, causes system job insecurity.

Summary of the invention

It is an object of the invention to make vicarious wireless charging system also can export constant voltage by output constant current, it is adaptable to electricity Pond is charged, the charging of multi load under the most single power supply, as charged many electric motor cars simultaneously；And it is easy to control, System working stability, simple in construction, low cost of manufacture.

The present invention realizes the first technical scheme that its goal of the invention used, a kind of based on the constant current becoming einer Primargrosse Constant voltage vicarious wireless charging system, is made up of transmitting portion and receiving portion, and receiving portion includes the secondary wire being sequentially connected with Circle, secondary compensation electric capacity, current rectifying and wave filtering circuit, cell load；Transmitting portion includes DC source, the high-frequency inversion being sequentially connected with Device, constant current constant voltage switching circuit one and primary coil；It is characterized in that, also go here and there between described high-frequency inverter and primary coil Being connected to constant current constant voltage switching circuit one, the composition of described constant current constant voltage switching circuit one is:

Primary constant current electric capacity and primary additional serial electric capacity is sealed in successively between high-frequency inverter and primary coil, and just Switching switch one in parallel on level additional serial electric capacity；And the control end of switching switch one is connected with controller one.

Further, the capacitance of described primary constant current electric capacityDetermined by formula (1):

${\stackrel{\‾}{C}}_{PC}=\frac{{\mathrm{\π}}^2{I}_B{\stackrel{\‾}{L}}_S}{\mathrm{\ω}\[{\mathrm{\π}}^2{\mathrm{\ωI}}_B(M^2-\stackrel{\‾}{L_P}\stackrel{\‾}{L_S})+8\stackrel{\‾}{E}M\]}---\left(1\right)$

The capacitance of described primary additional serial electric capacityDetermined by formula (2):

${\stackrel{\‾}{C}}_{PS}=\frac{I_B{V}_B{\mathrm{\π}}^2}{8\mathrm{\ω}{\stackrel{\‾}{E}}^2}---\left(2\right)$

The capacitance of described secondary compensation electric capacityDetermined by formula (3):

${\stackrel{\‾}{C}}_S=\frac{8\stackrel{\‾}{E}+{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}{8\stackrel{\‾}{E}{\mathrm{\ω}}^2{\stackrel{\‾}{L}}_S}---\left(3\right)$

The inductance value of described secondary compensation inductanceDetermined by formula (4):

${\stackrel{\‾}{L}}_L=\frac{8{\mathrm{MV}}_B-8\stackrel{\‾}{E}\stackrel{\‾}{L_S}}{{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}---\left(4\right)$

In formula (1), (2), (3) and (4),For the output voltage values of DC source (E), ω is system operating angle frequency, I_B For setting charging current, V_BFor setting charging voltage,It is respectively primary coil and secondary inductance value.

The using method of the first technical scheme of the present invention is:

Controller one controls switching switch one Guan Bi, and system i.e. works in constant current mode, to load output constant current, i.e. Constant charge current I set is provided to battery_B；It is suitable for battery charging initial stage employing.

Controller one controls switching switch one disconnection, and vicarious wireless charging system works in constant voltage mode, and system works In constant voltage mode, to load output constant voltage, i.e. provide the constant charge voltage V set to battery_B；After being suitable for battery charging Phase, cell voltage reach to use during charging setting voltage.

The present invention realizes the second technical scheme that its goal of the invention used, a kind of based on the constant current becoming einer Primargrosse Constant voltage vicarious wireless charging system, is made up of transmitting portion and receiving portion, and receiving portion includes the secondary wire being sequentially connected with Circle, secondary compensation electric capacity, current rectifying and wave filtering circuit, cell load；Transmitting portion includes DC source, the high-frequency inversion being sequentially connected with Device/constant current constant voltage switching circuit two and primary coil；It is characterized in that, also go here and there between described high-frequency inverter and primary coil Being connected to constant current constant voltage switching circuit two, the composition of described constant current constant voltage switching circuit two is:

The primary constant voltage electric capacity of concatenation between described high-frequency inverter and primary coil；Primary additional shunt capacitance and switching It is then parallelly connected with on primary constant voltage electric capacity after switch two series connection,；And the control end of switching switch two is connected with controller two.

Further, the capacitance of described primary constant voltage electric capacityDetermined by formula (5):

${\stackrel{\‾}{C}}_{PV}=\frac{{\mathrm{\π}}^2{V}_B{I}_B{\stackrel{\‾}{L}}_S}{\mathrm{\ω}\[8\stackrel{\‾}{L_S}{\stackrel{\‾}{E}}^2-8V_B\stackrel{\‾}{E}M+{\mathrm{\π}}^2{\mathrm{\ωV}}_B{I}_B(\stackrel{\‾}{L_P}\stackrel{\‾}{L_S}-M)\]}---\left(5\right)$

The capacitance of described additional shunt capacitanceDetermined by formula (6):

${\stackrel{\‾}{C}}_{PP}=\frac{8{\mathrm{\π}}^2{\stackrel{\‾}{E}}^2{I}_B{\stackrel{\‾}{L}}_S^2}{\mathrm{\ω}\[{\mathrm{\π}}^2{\mathrm{\ωI}}_B(M^2-\stackrel{\‾}{L_P}{\stackrel{\‾}{L}}_S)+8\stackrel{\‾}{E}M\]\[8\stackrel{\‾}{L_S}{\stackrel{\‾}{E}}^2-8V_B\stackrel{\‾}{E}M+{\mathrm{\π}}^2{\mathrm{\ωV}}_B{I}_B(\stackrel{\‾}{L_P}\stackrel{\‾}{L_S}-M^2)\]}---\left(6\right)$

The capacitance of described secondary compensation electric capacityDetermined by formula (7):

${\stackrel{\‾}{C}}_S=\frac{8\stackrel{\‾}{E}+{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}{8\stackrel{\‾}{E}{\mathrm{\ω}}^2{\stackrel{\‾}{L}}_S}---\left(7\right)$

The inductance value of described secondary compensation inductanceDetermined by formula (8):

${\stackrel{\‾}{L}}_L=\frac{8{\mathrm{MV}}_B-8\stackrel{\‾}{E}\stackrel{\‾}{L_S}}{{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}---\left(8\right)$

In formula (5), (6), (7) and (8),For the output voltage values of DC source (E), ω is system operating angle frequency, I_B For setting charging current, V_BFor setting charging voltage,It is respectively primary coil and secondary inductance value.

Controller two controls switching switch two Guan Bi, and system i.e. works in constant current mode, to load output constant current, i.e. Constant charge current I set is provided to battery_B；It is suitable for battery charging initial stage employing.

Controller two controls switching switch two disconnection, and vicarious wireless charging system works in constant voltage mode, and system works In constant voltage mode, to load output constant voltage, i.e. provide the constant charge voltage V set to battery_B；After being suitable for battery charging Phase, cell voltage reach to use during charging setting voltage.

In two schemes of the present invention, system output constant current and the theory analysis of constant voltage and circuit theory are:

Fig. 3, Fig. 4 are the system equivalent circuit of circuit topology of the present invention.According to the T-shaped equivalent circuit of Fig. 4, figure understands,

$\begin{array}{c}{\stackrel{\‾}{L}}_P^{\′}={\stackrel{\‾}{L}}_P-M\\ {\stackrel{\‾}{L}}_S^{\′}={\stackrel{\‾}{L}}_S-M\end{array}---\left(9\right)$

If system operating angle frequency is ω, for simplifying the analysis, by capacitance it isPrimary compensate electric capacity C_PAnd inductance Value isInductance L'_PIt is equivalent to an inductance L_Pe, its inductance value isMeet following relation:

${\stackrel{\‾}{L}}_{Pe}={\stackrel{\‾}{L}}_P^{\′}-\frac{1}{{\stackrel{\‾}{C}}_P{\mathrm{\ω}}^2}---\left(10\right)$

System input voltage can be derived from according to kirchhoffs lawElectric currentAnd output voltageElectric currentRelation as follows:

$\left[\begin{array}{c}{\stackrel{\·}{U}}_L\\ {\stackrel{\·}{I}}_L\end{array}\right]=\left[\begin{array}{cc}{a}_{11}& a_{12}\\ a_{21}& a_{22}\end{array}\right]\left[\begin{array}{c}{\stackrel{\·}{U}}_P\\ {\stackrel{\·}{I}}_P\end{array}\right]---\left(11\right)$

Wherein, a₁₂=a₂₂=0, i.e. show that system output voltage and electric current are all unrelated with input current,

$a_{11}=\frac{{\mathrm{MR}}_L^1}{(B-A{\stackrel{\‾}{C}}_S{\mathrm{\ω}}^2)R_L^1+j\[(A+B{\stackrel{\‾}{L}}_L)\mathrm{\ω}-A{\stackrel{\‾}{C}}_S{\stackrel{\‾}{L}}_L{\mathrm{\ω}}^3\]R_L^0}$

$a_{21}=\frac{M}{(B-A{\stackrel{\‾}{C}}_S{\mathrm{\ω}}^2)R_L^1+j\[(A+B{\stackrel{\‾}{L}}_L)\mathrm{\ω}-A{\stackrel{\‾}{C}}_S{\stackrel{\‾}{L}}_L{\mathrm{\ω}}^3\]R_L^0}$

$\begin{array}{cc}A=M{\stackrel{\‾}{L}}_{Pe}+M{\stackrel{\‾}{L}}_S^{\′}+{\stackrel{\‾}{L}}_{Pe}{\stackrel{\‾}{L}}_S^{\′}& B=M+{\stackrel{\‾}{L}}_{Pe}\end{array}$

If flowing through the electric current of equivalent resistanceWith system input voltageRatio be G_i, formula (11) system power can be obtained Gain G_i:

$G_i=\frac{{\stackrel{\·}{I}}_L}{{\stackrel{\·}{U}}_P}=a_{21}---\left(12\right)$

In order to make G_iDo not change with load change, a should be made₂₁In denominatorCoefficient be zero, it may be assumed that

$B-A{\stackrel{\‾}{C}}_S{\mathrm{\ω}}^2=0---\left(13\right)$

A, B are substituted into formula (13):

$M+{\stackrel{\‾}{L}}_{pe}-{\mathrm{M\ω}}^2\stackrel{\‾}{C_S}{\stackrel{\‾}{L}}_{pe}-{\mathrm{M\ω}}^2\stackrel{\‾}{C_S}\stackrel{\‾}{L_S^{\′}}-{\mathrm{\ω}}^2\stackrel{\‾}{C_S}{\stackrel{\‾}{L}}_{pe}\stackrel{\‾}{L_S^{\′}}=0---\left(14\right)$

Thus draw the capacitance C of the primary total compensation capacitance under constant current output pattern_P, separately it is denoted asFor:

${\stackrel{\‾}{C}}_{PCT}=\frac{{\mathrm{\ω}}^2\stackrel{\‾}{C_S}\stackrel{\‾}{L_S}-1}{{\mathrm{\ω}}^2(\stackrel{\‾}{C_S}{M}^2{\mathrm{\ω}}^2-\stackrel{\‾}{C_S}\stackrel{\‾}{L_P}\stackrel{\‾}{L_S}{\mathrm{\ω}}^2+\stackrel{\‾}{L_P})}---\left(15\right)$

Formula (15) is substituted into formula (12), and delivery is worth to the current gain of system:

$\left|G_i\right|=\frac{{\mathrm{\ω}}^2{\stackrel{\‾}{C}}_S(M+L_S^{`})-1}{M\mathrm{\ω}}---\left(16\right)$

In like manner, system output voltage is still setWith input voltageRatio be G_v, formula (11) system voltage can be obtained and increase Benefit G_v:

$G_v=\frac{{\stackrel{\·}{U}}_L}{{\stackrel{\·}{U}}_P}=a_{11}---\left(17\right)$

Equivalent resistance R to be made_LTerminal voltageUnrelated with load, need to meet a₁₁In denominatorCoefficient be zero, That is:

$j\[(A+B{\stackrel{\‾}{L}}_L)\mathrm{\ω}-{\mathrm{AC}}_S{\stackrel{\‾}{L}}_L{\mathrm{\ω}}^3\]=0---\left(18\right)$

By formula A, B substitutes into formula (17):

$M(\stackrel{\‾}{L_L}+{\stackrel{\‾}{L}}_{Pe}+\stackrel{\‾}{L_S^{\′}})+{\stackrel{\‾}{L}}_{Pe}(\stackrel{\‾}{L_L}+\stackrel{\‾}{L_S^{\′}})-{\mathrm{\ω}}^2{C}_S\stackrel{\‾}{L_L}\left(M\right({\stackrel{\‾}{L}}_{Pe}+\stackrel{\‾}{L_S^{\′}})+{\stackrel{\‾}{L}}_{Pe}\stackrel{\‾}{L_S^{\′}})=0---\left(19\right)$

Thus draw the primary total compensation capacitance C under constant voltage output mode_PCapacitance

${\stackrel{\‾}{C}}_{PCT}=\frac{V_B({\mathrm{\ω}}^2\stackrel{\‾}{C_S}\stackrel{\‾}{L_S}-1)}{{\mathrm{\ω}}^2(\stackrel{\‾}{E}M-V_B\stackrel{\‾}{C_S}{M}^2{\mathrm{\ω}}^2+V_B\stackrel{\‾}{C_S}\stackrel{\‾}{L_P}\stackrel{\‾}{L_S}{\mathrm{\ω}}^2-V_B\stackrel{\‾}{L_P})}---\left(20\right)$

Formula (20) is substituted into formula (17), and delivery is worth to the voltage gain of system:

$\left|G_v\right|=\frac{M+\stackrel{\‾}{L_L}+\stackrel{\‾}{L_S^{\′}}-{\mathrm{\ω}}^2{\stackrel{\‾}{C}}_S\stackrel{\‾}{L_L}(M+\stackrel{\‾}{L_S^{\′}})}{M}---\left(21\right)$

The fundamental voltage output of voltage virtual value of inverter and the relation of its input direct voltage be:

$U_P=\frac{2\sqrt{2}}{\mathrm{\π}}\stackrel{\‾}{E}---\left(22\right)$

The input voltage U of current rectifying and wave filtering circuit_L, electric current I_LFirst-harmonic virtual value and output voltage V_B, electric current I_BRelation For:

$\left\{\begin{array}{c}{U}_L=\frac{2\sqrt{2}{V}_B}{\mathrm{\π}}\\ I_L=\frac{\mathrm{\π}\sqrt{2}{I}_B}{4}\end{array}\right.---\left(23\right)$

Formula (9), (10), (22) and (23) is substituted into formula (17), obtains the capacitance of secondary compensation electric capacity

${\stackrel{\‾}{C}}_S=\frac{8\stackrel{\‾}{E}+{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}{8\stackrel{\‾}{E}{\mathrm{\ω}}^2{\stackrel{\‾}{L}}_S}---\left(24\right)$

Formula (9), (10), (22), (23) and (24) is substituted into formula (17), calculates secondary compensation inductance L_LInductance value

${\stackrel{\‾}{L}}_L=\frac{8{\mathrm{MV}}_B-8\stackrel{\‾}{E}\stackrel{\‾}{L_S}}{{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}---\left(25\right)$

Formula (9), (10) and (24) is substituted into formula (15), draws the electric capacity of primary total compensation capacitance under constant current output pattern Value

${\stackrel{\‾}{C}}_{PCT}=\frac{{\mathrm{\π}}^2{I}_B{\stackrel{\‾}{L}}_S}{\mathrm{\ω}({\mathrm{\π}}^2{\mathrm{\ωI}}_B{M}^2+8\stackrel{\‾}{E}M-{\mathrm{\π}}^2{\mathrm{\ωI}}_B\stackrel{\‾}{L_P}\stackrel{\‾}{L_S})}---\left(26\right)$

Formula (9), (10), (24) and (25) is substituted into formula (20), draws the primary total compensation capacitance under constant voltage output mode C_PCapacitance

${\stackrel{\‾}{C}}_{PVT}=\frac{{\mathrm{\π}}^2{V}_B{I}_B{\stackrel{\‾}{L}}_S}{\mathrm{\ω}(8\stackrel{\‾}{L_S}{\stackrel{\‾}{E}}^2-8V_B\stackrel{\‾}{E}M-{\mathrm{\π}}^2{\mathrm{\ωV}}_B{I}_{B}M+{\mathrm{\π}}^2{\mathrm{\ωV}}_B{I}_B\stackrel{\‾}{L_P}\stackrel{\‾}{L_S})}---\left(27\right)$

Due to primary total compensation capacitance value required under constant current modeThe primary total compensation required with under constant voltage mode CapacitanceVary in size, so needing to increase additional capacitor and switching switch changes electric capacity at primary circuit Value, thus realize the switching of constant current and constant voltage mode, and additional capacitor can access circuit with series connection two ways in parallel.

The first scheme as shown in Figure 1, primary constant current electric capacity C_PCValue be equal toWhen switching a Guan Bi, just Level additional serial electric capacity C_PSIt is shorted, the total capacitance value of constant current constant voltage switching circuit oneThen equal to the primary under constant current mode Total compensation capacitance C_PValueAnd during so switching a Guan Bi under scheme, system works in constant current output pattern；Break at switch one When opening, primary constant current compensates electric capacity C_PCWith primary additional serial electric capacity C_PSSeries connection, its total capacitance valueDetermined by formula (28)

$\frac{1}{{\stackrel{\‾}{C}}_{P1}}=\frac{1}{{\stackrel{\‾}{C}}_{PC}}+\frac{1}{{\stackrel{\‾}{C}}_{PS}}---\left(28\right)$

Take the most secondary additional serial electric capacity C_PSMakeValue be equal toThe most now constant current constant voltage switching circuit The total capacitance value of oneThen equal to the primary total compensation capacitance value under constant voltage modeDuring so switching a disconnection under scheme System works in constant voltage output mode, further, formula (26) and (27) is substituted into formula (28) and can try to achieve primary additional serial electric capacity C_PSCapacitance be:

${\stackrel{\‾}{C}}_{PS}=\frac{(8\stackrel{\‾}{E}+{\mathrm{\ωMI}}_B{\mathrm{\π}}^2)\[8\stackrel{\‾}{E}{V}_B+({\mathrm{MV}}_B+\stackrel{\‾}{E}{\stackrel{\‾}{L}}_S){\mathrm{\ωI}}_B{\mathrm{\π}}^2\]}{8I_B{\left(\mathrm{\π}\stackrel{\‾}{E}{\stackrel{\‾}{L}}_S\right)}^2{\mathrm{\ω}}^3}---\left(29\right)$

To sum up, when controller one controls switch one Guan Bi, system is operated in constant current charging mode；When controller one controls During switch one disconnection, system is operated in constant-voltage charge pattern.

First scheme as shown in Figure 2, primary constant voltage electric capacity C_PVValue be equal toWhen switching two disconnections, just Level additional shunt capacitance C_PPIt is open, the total capacitance value of constant current constant voltage switching circuit twoThen equal to the primary under constant voltage mode Total compensation capacitance C_PCapacitanceAnd during so switching two disconnections under scheme, system works in constant voltage output mode；Opening When closing two Guan Bis, primary constant voltage electric capacity C_PVWith primary additional shunt capacitance C_PPParallel connection, its total capacitance valueDetermined by formula (30)

${\stackrel{\‾}{C}}_{P2}={\stackrel{\‾}{C}}_{PV}+{\stackrel{\‾}{C}}_{PP}---\left(30\right)$

Take the most primary additional shunt capacitance C_PPMakeValue be equal toThe most now constant current constant voltage switching circuit The total capacitance value of twoThen equal to the primary total compensation capacitance value under constant current modeDuring so switching two Guan Bis under scheme System works in constant voltage output mode, further, formula (26) and (27) is substituted into formula (30) and can try to achieve primary additional shunt capacitance C_PPCapacitanceFor:

${\stackrel{\‾}{C}}_{PP}=\frac{I_B{\mathrm{\π}}^2}{8{\mathrm{\ωV}}_B}---\left(31\right)$

To sum up, when controller two controls switch two Guan Bi, system is operated in constant current charging mode；When controller two controls During switch two disconnection, system is operated in constant-voltage charge pattern.

Compared with prior art, the invention has the beneficial effects as follows:

One, the constant current constant voltage vicarious wireless charging system based on change einer Primargrosse that the present invention proposes, at constant current constant voltage The electric capacity of two specific capacitance values determined by system parameter values in switching circuit, under the switching of switch, perseverance can be respectively obtained Total compensation capacitance value required under total compensation capacitance value required under current charge pattern and constant-voltage charge pattern；It is thus possible to same Export under operating frequency and load unrelated constant current and constant voltage, meeting battery initial stage constant-current charge, later stage constant voltage is filled The requirement of electricity.System is operated under a Frequency point, does not haves frequency bifurcation, system working stability.

Two, the present invention only need to add two electric capacity and the constant current constant voltage switching circuit of a switch composition at primary circuit, Its circuit structure is simple, low cost.Only need to simply control the switching of switch during work, there is no the control strategy of complexity；Its control System is simple, convenient, reliably.

Three, after this circuit system parameter determination, the constant current unrelated with load of output and constant voltage and high frequency Inverter output voltage is relevant, therefore can be real by the circuit in parallel after this system high-frequency inverter on same high-frequency inverter The most multiple batteries or charger are charged, greatly reduce the high-frequency inverter quantity during charging of many cell loads, fall Low charging cost.

The present invention is further illustrated with detailed description of the invention below in conjunction with the accompanying drawings.

Accompanying drawing explanation

Fig. 1 is the electrical block diagram of the embodiment of the present invention 1；

Fig. 2 is the electrical block diagram of the embodiment of the present invention 2；

Fig. 3 is the equivalent circuit diagram of the present invention.

Fig. 4 is the T-shaped equivalent circuit diagram of the present invention.

Detailed description of the invention

Embodiment 1

Fig. 1 illustrates, the first detailed description of the invention of the present invention is, a kind of based on the constant current constant voltage sensing becoming einer Primargrosse Formula wireless charging system, is made up of transmitting portion and receiving portion, and receiving portion includes the secondary coil being sequentially connected with, secondary benefit Repay electric capacity, current rectifying and wave filtering circuit D, cell load Z；DC source E that transmitting portion includes being sequentially connected with, high-frequency inverter H, perseverance Stream constant voltage switching circuit one and primary coil；It is characterized in that, be also serially connected with between described high-frequency inverter H and primary coil Constant current constant voltage switching circuit one, the composition of described constant current constant voltage switching circuit one is:

Primary constant current electric capacity C is sealed in successively between high-frequency inverter H and primary coil_PCWith primary additional serial electric capacity C_PS, And at primary additional serial electric capacity C_PSUpper switching switch one in parallel；And the control end of switching switch one is connected with controller one.

In this example:

Described primary constant current electric capacity C_PCCapacitanceDetermined by formula (1):

${\stackrel{\‾}{C}}_{PC}=\frac{{\mathrm{\π}}^2{I}_B{\stackrel{\‾}{L}}_S}{\mathrm{\ω}\[{\mathrm{\π}}^2{\mathrm{\ωI}}_B(M^2-\stackrel{\‾}{L_P}\stackrel{\‾}{L_S})+8\stackrel{\‾}{E}M\]}---\left(1\right)$

Described primary additional serial electric capacity C_PSCapacitanceDetermined by formula (2):

${\stackrel{\‾}{C}}_{PS}=\frac{I_B{V}_B{\mathrm{\π}}^2}{8\mathrm{\ω}{\stackrel{\‾}{E}}^2}---\left(2\right)$

Described secondary compensation electric capacity C_SCapacitanceDetermined by formula (3):

${\stackrel{\‾}{C}}_S=\frac{8\stackrel{\‾}{E}+{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}{8\stackrel{\‾}{E}{\mathrm{\ω}}^2{\stackrel{\‾}{L}}_S}---\left(3\right)$

Described secondary compensation inductance L_LInductance valueDetermined by formula (4): (4)

${\stackrel{\‾}{L}}_L=\frac{8{\mathrm{MV}}_B-8\stackrel{\‾}{E}\stackrel{\‾}{L_S}}{{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}$

In formula (1), (2), (3) and (4),For the output voltage values of DC source E, ω is system operating angle frequency, I_BFor Set charging current, V_BFor setting charging voltage,It is respectively primary coil L_PWith secondary coil L_SInductance value.

Embodiment 2

Fig. 2 illustrates, the second detailed description of the invention of the present invention is, a kind of based on the constant current constant voltage sensing becoming einer Primargrosse Formula wireless charging system, is made up of transmitting portion and receiving portion, and receiving portion includes the secondary coil being sequentially connected with, secondary benefit Repay electric capacity, current rectifying and wave filtering circuit D, cell load Z；Transmitting portion includes that the DC source E, the high-frequency inverter H/ that are sequentially connected with are permanent Stream constant voltage switching circuit two and primary coil；It is characterized in that, be also serially connected with between described high-frequency inverter H and primary coil Constant current constant voltage switching circuit two, the composition of described constant current constant voltage switching circuit two is:

The primary constant voltage electric capacity C of concatenation between described high-frequency inverter H and primary coil_PV；Primary additional shunt capacitance C_PP It is then parallelly connected with primary constant voltage electric capacity C with after switching switch two series connection_PVOn,；And switching switchs control end and the controller two-phase of two Even.

In this example:

Described primary constant voltage electric capacity C_PVCapacitanceDetermined by formula (5):

${\stackrel{\‾}{C}}_{PV}=\frac{{\mathrm{\π}}^2{V}_B{I}_B{\stackrel{\‾}{L}}_S}{\mathrm{\ω}\[8\stackrel{\‾}{L_S}{\stackrel{\‾}{E}}^2-8V_B\stackrel{\‾}{E}M+{\mathrm{\π}}^2{\mathrm{\ωV}}_B{I}_B(\stackrel{\‾}{L_P}\stackrel{\‾}{L_S}-M)\]}---\left(5\right)$

Described additional shunt capacitance C_PPCapacitanceDetermined by formula (6):

${\stackrel{\‾}{C}}_{PP}=\frac{8{\mathrm{\π}}^2{\stackrel{\‾}{E}}^2{I}_B{\stackrel{\‾}{L}}_S^2}{\mathrm{\ω}\[{\mathrm{\π}}^2{\mathrm{\ωI}}_B(M^2-\stackrel{\‾}{L_P}{\stackrel{\‾}{L}}_S)+8\stackrel{\‾}{E}M\]\[8\stackrel{\‾}{L_S}{\stackrel{\‾}{E}}^2-8V_B\stackrel{\‾}{E}M+{\mathrm{\π}}^2{\mathrm{\ωV}}_B{I}_B(\stackrel{\‾}{L_P}\stackrel{\‾}{L_S}-M^2)\]}---\left(6\right)$

Described secondary compensation electric capacity C_SCapacitanceDetermined by formula (7):

${\stackrel{\‾}{C}}_S=\frac{8\stackrel{\‾}{E}+{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}{8\stackrel{\‾}{E}{\mathrm{\ω}}^2{\stackrel{\‾}{L}}_S}---\left(7\right)$

Described secondary compensation inductance L_LInductance valueDetermined by formula (8):

${\stackrel{\‾}{L}}_L=\frac{8{\mathrm{MV}}_B-8\stackrel{\‾}{E}\stackrel{\‾}{L_S}}{{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}---\left(8\right)$

In formula (5), (6), (7) and (8),For the output voltage values of DC source E, ω is system operating angle frequency, I_BFor Set charging current, V_BFor setting charging voltage,It is respectively primary coil L_PWith secondary coil L_SInductance value.

Claims (4)

1. a constant current constant voltage vicarious wireless charging system based on change einer Primargrosse, is grouped by transmitting portion and acceptance division Becoming, receiving portion includes the secondary coil (L being sequentially connected with_S), secondary compensation electric capacity (C_S), current rectifying and wave filtering circuit (D), battery bear Carry (Z)；DC source (E) that transmitting portion includes being sequentially connected with, high-frequency inverter (H), constant current constant voltage switching circuit one (Q₁) With primary coil (L_P)；It is characterized in that, described high-frequency inverter (H) and primary coil (L_PConstant current also it is serially connected with permanent between) Pressure switching circuit one (Q₁), described constant current constant voltage switching circuit one (Q₁) composition be:

High-frequency inverter (H) and primary coil (L_PPrimary constant current electric capacity (C is sealed in successively between)_PC) and primary additional serial electric capacity (C_PS), and at primary additional serial electric capacity (C_PS) upper parallel connection switching switch one (S₁)；And switching switch one (S₁) control end with Controller one (K₁) be connected.

A kind of constant current constant voltage vicarious wireless charging system based on change einer Primargrosse the most according to claim 1, it is special Levy and be,

Described primary constant current electric capacity (C_PC) capacitanceDetermined by formula (1):

${\stackrel{\‾}{C}}_{PC}=\frac{{\mathrm{\π}}^2{I}_B{\stackrel{\‾}{L}}_S}{\mathrm{\ω}\[{\mathrm{\π}}^2{\mathrm{\ωI}}_B(M^2-\stackrel{\‾}{L_P}\stackrel{\‾}{L_S})+8\stackrel{\‾}{E}M\]}---\left(1\right)$

Described primary additional serial electric capacity (C_PS) capacitanceDetermined by formula (2):

${\stackrel{\‾}{C}}_{PS}=\frac{I_B{V}_B{\mathrm{\π}}^2}{8\mathrm{\ω}{\stackrel{\‾}{E}}^2}---\left(2\right)$

Described secondary compensation electric capacity (C_S) capacitanceDetermined by formula (3):

${\stackrel{\‾}{C}}_S=\frac{8\stackrel{\‾}{E}+{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}{8\stackrel{\‾}{E}{\mathrm{\ω}}^2{\stackrel{\‾}{L}}_S}---\left(3\right)$

Described secondary compensation inductance (L_L) inductance valueDetermined by formula (4):

${\stackrel{\‾}{L}}_L=\frac{8{\mathrm{MV}}_B-8\stackrel{\‾}{E}\stackrel{\‾}{L_S}}{{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}---\left(4\right)$

In formula (1), (2), (3) and (4),For the output voltage values of DC source (E), ω is system operating angle frequency, I_BFor setting Determine charging current, V_BFor setting charging voltage,It is respectively primary coil (L_P) and secondary coil (L_S) inductance value.

3. a constant current constant voltage vicarious wireless charging system based on change einer Primargrosse, is grouped by transmitting portion and acceptance division Becoming, receiving portion includes the secondary coil (L being sequentially connected with_S), secondary compensation electric capacity (C_S), current rectifying and wave filtering circuit (D), battery bear Carry (Z)；Transmitting portion includes DC source (E), high-frequency inverter (the H)/constant current constant voltage switching circuit two (Q being sequentially connected with₂) With primary coil (L_P)；It is characterized in that, described high-frequency inverter (H) and primary coil (L_PConstant current also it is serially connected with permanent between) Pressure switching circuit two (Q₂), described constant current constant voltage switching circuit two (Q₂) composition be:

Described high-frequency inverter (H) and primary coil (L_PThe primary constant voltage electric capacity (C of concatenation between)_PV)；Primary additional parallel electricity Hold (C_PP) and switching switch two (S₂) it is then parallelly connected with primary constant voltage electric capacity (C after series connection_PVOn),；And switching switch two (S₂) control End processed and controller two (K₂) be connected.

A kind of constant current constant voltage vicarious wireless charging system based on change einer Primargrosse the most according to claim 3, it is special Levy and be,

Described primary constant voltage electric capacity (C_PV) capacitanceDetermined by formula (5):

${\stackrel{\‾}{C}}_{PV}=\frac{{\mathrm{\π}}^2{V}_B{I}_B{\stackrel{\‾}{L}}_S}{\mathrm{\ω}\[8\stackrel{\‾}{L_S}{\stackrel{\‾}{E}}^2-8V_B\stackrel{\‾}{E}M+{\mathrm{\π}}^2{\mathrm{\ωV}}_B{I}_B(\stackrel{\‾}{L_P}\stackrel{\‾}{L_S}-M)\]}---\left(5\right)$

Described additional shunt capacitance (C_PP) capacitanceDetermined by formula (6):

${\stackrel{\‾}{C}}_{PP}=\frac{8{\mathrm{\π}}^2{\stackrel{\‾}{E}}^2{I}_B{\stackrel{\‾}{L}}_S^2}{\mathrm{\ω}\[{\mathrm{\π}}^2{\mathrm{\ωI}}_B(M^2-\stackrel{\‾}{L_P}{\stackrel{\‾}{L}}_S)+8\stackrel{\‾}{E}M\]\[8\stackrel{\‾}{L_S}{\stackrel{\‾}{E}}^2-8V_B\stackrel{\‾}{E}M+{\mathrm{\π}}^2{\mathrm{\ωV}}_B{I}_B(\stackrel{\‾}{L_P}\stackrel{\‾}{L_S}-M^2)\]}---\left(6\right)$

Described secondary compensation electric capacity (C_S) capacitanceDetermined by formula (7):

${\stackrel{\‾}{C}}_S=\frac{8\stackrel{\‾}{E}+{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}{8\stackrel{\‾}{E}{\mathrm{\ω}}^2{\stackrel{\‾}{L}}_S}---\left(7\right)$

Described secondary compensation inductance (L_L) inductance valueDetermined by formula (8):

${\stackrel{\‾}{L}}_L=\frac{8{\mathrm{MV}}_B-8\stackrel{\‾}{E}\stackrel{\‾}{L_S}}{{\mathrm{\π}}^2{\mathrm{M\ωI}}_B}---\left(8\right)$

In formula (5), (6), (7) and (8),For the output voltage values of DC source (E), ω is system operating angle frequency, I_BFor setting Determine charging current, V_BFor setting charging voltage,It is respectively primary coil (L_P) and secondary coil (L_S) inductance value.